Normally, fertilization occurs in the ________, and implantation occurs in the ________
A) oviduct (fallopian tube); uterus B) vagina; uterus
C) ovary; oviduct (fallopian tube) D) uterus; ovary
Answer: A
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Chordin is an organizer protein found only in the dorsal regions of frog embryos. Removing chordin would most likely disrupt the determination of which structure?
A) central nervous system B) digestive system C) kidneys D) lungs
The master controller of the neuroendocrine system is the
A. cerebrum. B. hypothalamus. C. pituitary gland. D. thalamus.
Hypotheses are
a. often in the form of a statement. b. often expressed negatively. c. sometimes crude attempts to offer a possible explanation for observations. d. testable predictions. e. all of these.
A genetic cross was performed with two pea plants both with green, wrinkled seeds. Of the resulting offspring, 75% had green, wrinkled seeds and 25% had green, smooth seeds (W = wrinkled; w = smooth)
With regard to wrinkled versus smooth seeds, the parental plants must have been ________. Fill in the blank with correct word.